Team-operated wagon brake



Aug. 21, 1923.

J. F. BOETTNER TEAM OPERATED WAGON BRAKE Filed April 25, 1921 LWN KN Patented Aug. 21, 1923.

. Amvrrlizn STATES PArENr oferece- JOHN F. BOETTNER, OF WATSON, MISSOURI.

Application ined Aprirza,

a wagon braking mechanism for control by the draft team to the end that the brake shoes are withdrawn fromcontact with the wheels of the vehicle by forward strain applied to the draft appliances and are'permitt'ed to engage the wheels when the forward strain is relieved to resist or retard the forward movement of the vehicle in descending grades;v and more especially vto provide a simple, inexpensive and efficient mechanism for accomplishing the object indicated and which can be readily applied to vehicles now in use; andwith these objects in view the inventionconsists in a yconstruction and combination of parts of` which a preferred embodiment is shown in the accompanying drawings, wherein Figure 1 is a plan view of a brake mechanism embodying the invention. ,p

Figure 2'is a longitudinal sectional view of the frontportion' of the 'same on thefplane indicated by the line 2-2 of Figure 1i Figure is a detail plan view of zthe locking lever and related parts showing' the former in dotted'lines approaching its inactive or inoperative position as a lock.

Fig. 4 is a viewsimilar toFigiire 3 showing the'lockinglever in released position. Y

Thebrake beam 10 whichcarries theshoes 11v for engagement with Ythe wheels 12 is yieldingly held in its' braking'position by spring action represented in the construction illustrated by the twin coiled springs 13 attached at their rear ends through adjustable bolts 14 to a cross barV 15 of the vehicle frame, such as the rear aXle as shown, to the end that any desired tension may be applied tosaid spring elements by the adjustment of said bolts, Vand connected at their front ends to a rocker 16 consisting of a bar pivoted at an intermediate point to a clevis 17 extended through the brake beam and serving as a means of attachment thereto of a plate 18 to which is pivotally connected a lever 19 fulcrumed by means of a link 2() upon the reach bar 21 or other convenient portion of the vehicle running gear.

, TEALQPEBATED WAGON BRAKE..

'1,921.' serial No. 4ssen,

,The doute-tree 22 'which Carries uiebeit* 23 operating in registering slots 24 and'25 Vrespectively in ther-clip 26v andv tongue 27,

is designed to impartflongitudinal movement tol the extension 2S of the bolt which consti-Q n tutes Aa draw. bar connected by ai cable 29',v y with the lever 19, so that when' a strain tending to advance theA vehicley isap'plied to the double-tree the forward movement there of limited by the slots in thev clip/and tongue y serves to advance the vbrake beam tojrei lease the wheels'of the vehicle ofthe pressure of the vbrake shoes, to` thefend that 'under normalconditions the vehicle is free to move forward unimpeded bythe brake mechanism. Upon the reduction of draft strain upon the double-tree, however, the rearward y.movement ofthe brake beamy is effected bythe 'contraction of the spring Velements lwhich may be of' any desired numbery and tension,

to' apply braking pressure to the wheels to Q.

retard or resist the forward movement ofthe vehicle as in descending grades or `whenitgis desired to check the forward movement lasy iin stopping thefvelhicle.l The pivotbolt -SQ'by which the lever 1'9isfcon'nected to theplate 18 is adapted for engagement vselectively with ya seriesY of openingsinsai'd platel to facilitate the applitzationV of the apparatusito.

different vehicles havingftheframe members arranged 1n different relat1ons, `and the lever 19 is `provided witha pluraht'yof openings 31 for* selective engagementby the Vrear end of the cable 29 to vary theileverag'e of-"thfe draft upon the brakebeam tosuit-the weight of the vehicle or the load or otherconditfions t0 be encountered in the useV of the device.

In order to provide for the backing of the vehicle when requiredwithout imposingV an unnecessaryv effort Aupon ythe team4 as'would c be produced by .the frictional Vcontact-fof the brake shoes againstfthe wheel tires, itis preferable r`vtoemploy ,in Aconnection vvvith the mechanism above described a means for Alocking the brake mechanism in an inoperative position and with the brake shoes removed fromthe wheels. To this end there is mounted upon the tongue 27 or otherconvenient portion of the vehicle frame a shifting lever 82 fulcrummed. as at 33 by means of a bolt or the equivalent thereof and carrying at. an intermediate portion of its length a clip 34 pivoted as at 85 to the lever and having a terminal pin 36 in engagement with an opening 37 in the draw bar 28, said lever being adapted for horizontal-swinging movement to bring a terminalstop ear 38 into contact with the side edge of the draw bar in which position the rearward strain applied to said bar by reason of the cable 29 and incident to the tension of the springs 18 will serve to lock the lever against accidental displacement while the latter holds the said springs under `tension Vconnection 35 of the clip with the brake beam advanced suiiiciently'tov entirely relieve the vehicle wheels of pressure. The arrangement of the pivotal bolt 33 at one side of the line of draft applied -by the springs through the pivotal Y y witlithe lever constitutes an eccentric lock. -v v- In the operation of the invention, the

brake :isarranged to normally effect brakingactionfon the rear wheels l2, except l when a. draft strainis applied to the tongue 27 ,when the beam 10 is drawn forwardly t0 relieve the brake shoesV 11 from contact with the wheels..z Upon the release of the strain due to the movement of the vehicle, the springs 13 are free to act to effect braking action of the shoes 1l on the wheels l2. y To `permit free movement of the brake beam to effect braking and release movement, the

shifting lever must be swung outwardly torelease position, asV shown in Figure Il,

lwhen*.longitudinal movement of the draw bar`28 is permitted. To dispose the brake beam *10 in inoperative position where it will not move the Vshoes 11 toward the wheels 12,'V Vas when it is not desired, to employ the Vbraking mechanism, the lever 32 is swung into .a position of parallelism with the draw *barl 28 when the stop ear 38 contacts ,with

the latter, when tension will be applied to V Y cable 29 to shift the bralzebeam forwardly away fromjth'e wheels l2. As long asv the "lever remainsin the position with its stop Vear 38in contact with the; draw bar 28. the cable remains under tension whetherthere is a pull on the tongue or not and the springs 13 are precluded from moving the brake beam to :eifectfbrfaling action.

Having described the invention what I claimas new and useful is l.` A team operated brake mechanism'liaving a spring actuated Vbrake beam yielding- 1y held in'brake applying posit-ion, a draw bar movable longitudinallyn of the vehicle and having' draft l.appliances connected Vthe brake applying spring. Y

2. .A team operated brake mechanism having a spring actuated brake beam yieldingly held in brake` applying position, a'draw bar v28 movable longitudinally ofthe; `ve-.;

hicle and hak-Jingy draft appliances connected therewith, connections between the draw bar and the brake beam for moving the latter in opposition to the tension of itsactuating spring.and locking means for securingI tiie/- f draw bar with lthe brake beam .in an inop-r erative position and consisting of a lever mounted Vfor swinging movement in a'plane parallel with the draw bar and provided Yat an intermediate portion of its length with .a pivotal clip having engagement with the drawbansaid lever being eccentrically pivotedfor movement into locking position when actuated to move the draw bar in opposition to the tension of the brake actuating springV l 3. A team operated brake mechanism having aspringactuated brake beam .yieldingly held in brake applyingpositioina draw bar movable longitudinally of the .vehicle .-7.

andlhaving draft appliances` connected therewith, connections between the draw bar and the brake beam for'movingthe latterin opposition to vthetension of its actuating draw bar with the brake beam inaninopeiative 'position and consisting ofa leverV eccentrically -pivoted at oneend vand vprovided spring, and locking means for securing the at the free end with a Stop ear for engage- Vment with thedraw bar, a clip'pivotally mounted upon the lever intermediate of the 'i ends thereof andhaving a pin for engaging an opening in the draw bar to move the latter in opposition to the tension of the'brake beam actuating spring` In testimony whereof he aiiixes his 'sigl nature.

JoHN `n BonTTNnR; 

